TREA

Tetsushi Matsumura

Follow

Person

  • Tokyo, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Building panel obtained by riveting method
    • Patent number 6,138,419
    • Issue date Oct 31, 2000
    • Mitsubishi Chemical Corporation
    • Takamasa Sekiguchi
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...